Traditional explanations for why some animals are monogamous and others are promiscuous or polygamous have focused on how the distribution and defensibility of resources (such as food, nest sites, or mates) determine whether, for example, one male can attract and defend multiple females.
A thirteen-lined ground squirrel (Ictidomys tridecemlineatus) at the Pawnee National Grassland in northeastern
Colorado. Species in the squirrel…
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